四川大学学报：工程科学版2011，Vol.43Issue(6)：163-167,5.
协作频谱感知中的信道搜索机制优化
Optimization of the Channel Searching Mechanisms in Cooperative Spectrum Sensing
摘要
Abstract
Spectrum sensing has been identified as the fundamental issue in cognitive radio networks（CRNs）.To improve the overall sensing performance,the mechanisms of cooperative spectrum sensing are investigated.Specifically,aiming at the sensing scenario of channel searching,a joint optimized channel-searching scheme is proposed.In this scheme,the base station chooses the optimal searching sequence according to the channels＇ static probabilities of being idle,and meanwhile,sets the searching durations of each candidate with different weights.Utilizing this optimal mechanism,the channels with higher idle probabilities can be guaranteed to be searched with higher priorities and longer durations,and thus,the delay due to channel switching and the corresponding QoS loss are minimized.The simulation results show that the average time for finding a new available channel by the proposed searching scheme is always much shorter than that of two existing schemes,and thus,visible performance improvement can be obtained.关键词
认知无线电/频谱感知/协作频谱感知/感知机制/信道搜索Key words
cognitive radio/spectrum sensing/cooperative spectrum sensing/sensing mechanisms/channel searching分类
信息技术与安全科学引用本文复制引用
刘全,郭云玮,高俊,刘思洋..协作频谱感知中的信道搜索机制优化[J].四川大学学报：工程科学版,2011,43(6):163-167,5.基金项目
国家“863”计划资助项目 （）
